How accurate is my Dexcom ONE compared to my blood glucose meter?
Dexcom CGM systems provide much more information for users than traditional Self-Monitoring of Blood Glucose (SMBG) does. For Dexcom ONE users, the expected level of accuracy is based on comparisons to fingerstick results--which require careful consideration of timing and technique consistency when drawing blooding glucose values.
Here are the accuracy performance characteristics* of the Dexcom ONE system:
| Adults * | Pediatric* | |
| Overall Accuracy: Mean ARD% (MARD), 40–400 mg/dL (% average absolute error versus reference across all glucose levels) |
9.8% | 7.7% |
| Accuracy Over Time: Mean ARD% (MARD), 40–400 mg/dL | ||
| Day 1: | 8.6% | 10.5% |
| Day 2: | 8.7% | 7.8% |
| Days 4–5: | 10.7% | 7.2% |
| Day 7: | 10.6% | 6.2% |
| Day 10: | 10.6% | 7.1% |
|
Clinical Accuracy: |
92% [100%] | 96% [99.8%] |
Reference: Shah VN, et al. Diabetes Technol Ther. 2018;20(6):428–433.
* Reference is YSI (Yellow Springs Laboratory Instrument)
Discover education resources, organised in a 5-step journey, to learn key information about your Dexcom ONE CGM system, from getting started, your first 10 days, to using Dexcom ONE in the long run.
| Step 1: | The basics of CGM |
| Step 2: | Getting started |
| Step 3: | Your first 10 days |
| Step 4: | Using Dexcom ONE in the long run |
| Step 5: | Understand your Diabetes trends |